(10305) Grignard Main-belt Asteroid
Discovered on 29 December 1989 by E. W. Elst at Haute Provence.
Fernand (Ferre) Grignard (1939-1982), a member of an ancient family, became famous during the 1960s in Western Europe for his folk songs and blues. Another well-known family member is Victor Grignard (1871-1935), who received the 1912 Nobel prize for chemistry.Naming citation (20000320/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Grignard is today
Seen from above the solar system on 2026-10-14: Grignard is 2.58 au from the Sun and 2.46 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10305 |
| Provisional designation | 1989 YP5 |
| Orbit class | Main-belt Asteroid |
| Diameter | 10.8 km (#4,648 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0440 |
| Rotation period | 3.27 hours |
| Absolute magnitude (H) | 13.8 |
| Orbital period | 4.09 years |
| Semi-major axis | 2.56 au |
| Perihelion – aphelion | 2.23 – 2.89 au |
| Eccentricity | 0.128 |
| Inclination | 5.65° |
| Closest distance between its orbit and Earth's (MOID) | 1.23 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 29 December 1989
More named asteroids discovered by E. W. Elst
- (3631) Sigyn
- (3784) Chopin
- (3870) Mayre
- (3903) Kliment Ohridski
- (3910) Liszt
- (3912) Troja
- (3918) Brel
- (4038) Kristina
- (4226) Damiaan
- (4342) Freud
- (4344) Buxtehude
- (4345) Rachmaninoff
← (10304) Iwaki · (10306) Pagnol →